(1B) The product $(a+b)(c+d)$
Practice
Expand and simplify.
*Write your answers with powers of $x$ in descending order. $\left(\square x^2 \pm \square x \pm \square\right)$
$\left(x-2\right)\left(x+2\right)$
$\left(x+8\right)\left(x+1\right)$
$\left(x-7\right)\left(5+x\right)$
$\left(x+6\right)\left(2-x\right)$
$\left(8+x\right)\left(x-2\right)$
$\left(-4+x\right)\left(-x+2\right)$
$\left(2-x\right)\left(5+x\right)$
$\left(9-x\right)\left(-2+x\right)$
$\left(-5x+4\right)\left(x-8\right)$
$\left(2x+7\right)\left(-7x+1\right)$
$\left(x+6\right)\left(-7+2x\right)$
$\left(-x+4\right)\left(8+5x\right)$
$\left(-3+2x\right)\left(5x+6\right)$
$\left(6+5x\right)\left(3x+1\right)$
$\left(1+5x\right)\left(5+x\right)$
$\left(-7+3x\right)\left(8-x\right)$